Role of Magnetic Resonance Imaging in Evaluation of Ring Enhancing Lesions in Brain in Correlation with Magnetic Resonance Spectroscopy

Ring enhancing lesions are one of the most commonly encountered neuroimaging abnormalities. A wide range of etiologies may present as cerebral multiple ring enhancing lesions. On neuro imaging, these lesions appear as hypodense or isodense mass lesions on non-contrast computed (plain) tomography studies. � After contrast administration, there is a ring or a homogeneous disk like enhancement within the region of hypodensity � MRI�s clinical advantage in early detection of disease is visually demonstrated as unmistakable contrast between gray and white matter and ischaemia / infarct, edema, MS plaques, infection/abscess tumor and hemorrhage. � MR spectroscopy is a potential tool for differential diagnosis between brain abscesses and non-infectious lesions such as primary brain tumor, lymphoma, brain metastasis and tuberculoma. � Magnetic resonance spectroscopy (MRS) provides information about the possible extent and nature of changes on a routine MRI scan by analyzing the presence and / or ratio of tissue metabolites such as NAA, creatine, choline, and lactate etc. .